Aquarium CO2 Bubble Counter with Built-in Check Valve for CO2 Generator Regulator, Double-Head

I bought 4 and I only had them for a day at the time of writing this review. Out of the 4 I purchased, one of them has a defective check valve. The replacement policy is nice and for 10 bucks id say it was worth the risk. Definitely is a nice short term option if you are looking to save up for a better co2 kit. Paired it with a fluval 45g co2 kit.

They work well enough. I have mine connected to a splitter off my single stage co2 regulator so that I can split one regulator into 2 aquariums without buying an expensive dual output regulator. They hold onto the lines well and seem to act as a decent check valve.

This is a great bubble counter. All of the pictures show it connected upside down though. It only works if the bubble stem inside is set on the CO2 end.

This Bubble Counter Is Pleasing To Look At And Very Accurate

Fits 3/16" ID co2 line. Withstands the pressure and doesn't leak.